Electronics Forum | Tue Jun 29 14:55:22 EDT 2010 | rgduval
For the capacitors that Yageo analyzed... Were they taken out at representative points in the process?? ie. were samples taken from pre-assembly, pre-ICT, post-conformal coat, post-final test? You note that the parts 'seem' to be ok up to ICT. And
Electronics Forum | Wed Jun 24 13:26:39 EDT 1998 | Brian @ ETS
Dear Upinder, While reading the posts at the SMTnet forum I noticed your post pertaining to Curing ovens for use with Conformal Coatings which require regulated relative humidity to activate the cure. My company, ETS, is the manufacturer of Nordson's
Electronics Forum | Fri Mar 20 10:31:19 EST 1998 | Mick Jones
| I will be starting a conformal coating process soon, I am looking for any pointers on | 1) Best method for masking components, tape mask, liqued mask | 2) Which is best Spray or Dip? | 3) Compatiblity with no clean solder paste (flux residue) | I h
Electronics Forum | Fri Jun 12 17:26:48 EDT 2009 | sadamson
I'm not the Asymtek expert on this subject but you have to run a ROI study. When you buy a system you have to look at how much time you are spending on masking. If every job is a one board special, then you may be better off spraying on a coating. Ho
Electronics Forum | Mon Sep 26 15:17:54 EDT 2005 | Amol
Hi, I am spray coating PCB's with the above mentioned coating. The problem is that as soon as the boards are coated, there are pin holes on the surface that subsequently turn into localized areas of dewet on te PCB (its almost as it the coating is fl
Electronics Forum | Thu Sep 17 11:19:57 EDT 2009 | jdumont
Does anyone have a reference to a spec for this? We have a tall SMT IC that we coat with AR coating in a Asymtek spray coating machine. We do not have the angle head option to spray from a 45 so the sides of tall parts are sometimes left uncovered.
Electronics Forum | Thu Jul 23 22:50:38 EDT 1998 | Steve Gregory
Hey youse guyz... We're finally getting our first real job at the start-up I'm working at. It's actually a pretty unique little board too. Simple as all get out, but unique. You're not gonna believe what this goes into...guess? (I bet ya' you'll neve
Electronics Forum | Sat Aug 12 09:47:36 EDT 2000 | Dave F
GJ: If your supplier uses a conformal coating that "must be applied to a clean surface," then you are using the wrong supplier and no amount of twiddling with your N2 levels will change this. NC fluxes are inherently "dirty" and nothing aside of cle
Electronics Forum | Wed Apr 14 20:39:02 EDT 1999 | Dave F
| I need to cure conformal coat on a 19" x 15" board. The material needs 7 - 10 minutes at 100deg C, but I have limited floorspace so I'm looking for an oven with about 36 inches heated length and 18 or more inch wide belt. The material we are consid
Electronics Forum | Tue Jul 16 10:15:12 EDT 2002 | robbied
Hi, we have recently had some customer returns where the 44 pin j-lead ASIC devices exhibit green corrosion from the copper under the tin plating on the leads. These boards were in the field for around 4 years, with innadequate conformal coating pro
